The ISL6740, ISL6741 family of adjustable frequency, low power, pulse width modulating (PWM) voltage mode (ISL6740) and current mode (ISL6741) controllers is designed for a wide range of power conversion applications using half-bridge, full bridge, and push-pull configurations. These controllers provide an extremely flexible oscillator that allows precise control of frequency, duty cycle, and deadtime. This advanced BiCMOS design features low operating current, adjustable switching frequency up to 1MHz, adjustable soft-start, internal and external over-temperature protection, fault annunciation, and a bidirectional SYNC signal that allows the oscillator to be locked to paralleled units or to an external clock for noise sensitive applications.
The ISL6740 (voltage‑mode) and ISL6741 (current‑mode) are low‑power PWM controllers with a flexible oscillator that allows precise control of frequency, duty cycle, and dead‑time. Features include 95 µA startup current, adjustable soft‑start, internal and external over‑temperature protection, fault annunciation, and a bidirectional SYNC signal for synchronization with other units or an external clock.
Typical applications cover half‑bridge, full‑bridge, and push‑pull power conversion topologies such as DC‑DC converters, telecom and datacom power supplies, and wireless base‑station power. The devices are offered in 16‑lead SOIC and TSSOP packages and comply with RoHS and Pb‑free requirements.
| Supply Voltage Range | 9 VDC – 16 VDC |
|---|---|
| Startup Current | 95 pA |
| Operating Current | 5.0 – 8.0 mA |
| Oscillator Frequency (adjustable) | up to 2 MHz |
| Package Types | 16‑lead SOIC and 16‑lead TSSOP |
The startup current is 95 pA.
The oscillator frequency can be adjusted up to 2 MHz.